Poppet valve



Nov. 26, 1940. 6,1'. lzucnwNEYy 2,223,247'

POPPET VALVE Original Filed Dec. 27, v1938 27 n LM/Mw @.TDwne? gg MPatented Nov. 26, 1940 UNITED STATES PorPE'r vALvE George T. Downey,Corry, yPa., assignor to Aero Supply Manufacturing Co.,.Inc., Corry, Pa.

Original applications December 27, 1938, ySerial No. 247,909, and July13, 1939, Serial No.

284,313. Divided and this application October 6, 1939, Serial N0.298,325

1 claim. (o1. rs1- 160)A This invention relates to' valves and is adivision of my co-pending applications, Serial No. 247,909 filedDecember 27, 1938, for Valve structures, and also Serial No. 284,313filed `July 13, 1939, for Valve assembly.

An object of this invention is to provide an improved poppet valvewherein the head portion thereof is provided with a replaceable orrenewable gasket so that a worn valve may be quickly and easily renewedwithout the necessity of grinding the new valve on the seat.

Another object of this invention is to provide an improved valve whichis designed for use in closing a fluid port and which will eifectivelyclose a port through which gasoline or other fluids are adapted to now.

A further object of this invention is to provide a poppet valve which isso constructed that it will effectively close a gasoline port withoutgrinding the valve on the valve seat.

A still further object of this invention is to provide a poppet valvewhich is formed with a metal body including a metal head and an integralstem, a composition disc-shaped gasket, and an improved clamping meansfor removably holding the gasket against the head. l

A further object of this invention is to provide an improved poppetvalve for use with a valve assembly as embodied in` my'co-pendingapplications hereinbefore mentioned in which the valve is-provided witha socket or recess opening through the side thereof opposite from thestem so that a relatively small spring may be used to'hold the valveseated and so that the uid will not be required to pass through theconvolutions of the spring. 7

A further object of the invention is to provide, in a manner ashereinafter set forth, a poppet valve structure including a gasket andwiththe latter so arranged, relative to the other elements of thestructure to prevent the gasket buckling.

A further object of the invention lis to provide, in. a manner ashereinafter set forth, a poppet valve structure including a clampingplate and a non-buckling radially expansible gasket and with the latterhaving a part extended from its clamping plate to constitute areinforced valv seat engaging portion.

A further object of the invention is to provide, in a manner ashereinafter set forth, a poppet valve structure including a valve headin the form of a fiat annulus, a stem integral with and extendinglaterally from one side thereof and with the stem having an outerenlarged hollow portion and a reduced solid rear portion, said outerportion of the stem having its inner face flush with the inner edge ofthe head, a gasket encompassing the outer portion 0f the stem,:corresponding in diameter to and having one side positioned throughoutagainst the said side of the head,.a flat clamping plate mounted on theouter'portion of the stem, of less diameter than the gasket and havingone side throughout bearing against the other side'of the gasket andmeans encompassing and seated inthe periphery of the outer portion ofthe stem for holding the head, gasket and plate in abutting relation,the arrangement being'such as to prevent subjectingthe gasket to aAtorsional shearing force, to prevent the buckling ofthe gasket and topermit of the'radial expansion of the gasket;

Tothe'foregoing objects and to others which may hereinafter appear,the-invention'consists of the novel construction, combination andarrangementof parts as will `be more specically referred to andillustrated in `the 'Y accompanying drawing wherein is disclosedembodimentsiof the invention, but it is to be understood that `changes,

variations and modifications may be resorted to which fall `within thescope of the invention as claimed. i

In the drawing: 'l

Figure 1 is a detail side elevation of a `poppet valve constructedaccording to anembodiment of this invention and as disclosed in myco-pending applications, Serial No. 247,909 filed December 27, 1938, andSerial No. 284,313 led July 13, 1939, and t Figure 2 is an enlargedvertical section partly in detail of the `structure shown in Figure 1.

In the drawing thereis disclosed a form of valve structure including anaxially `apertured head 22 and a stem generally designated as V23. Thehead 22 has a disc-like configuration and is provided with a rightangular or cylindricalmarginal edge 24. The stem 23 is formed integralwith the head 22 and comprises an upper stem portion 25 and a lower stemportion 26. The stem portion 26 is substantially smaller in diameterthan the upper stem portion 25 and is provided at its lower end with arounded end 21 which is adapted to engage with a suitable valve liftingmeans for lifting the valve into open position. The upper stem member 25is provided Witha central and upwardly opening socket or recess 28within which a valve compressing spring 29 is adapted to engage. Theinner face of the member or outer portion 25 of the stem is iiush withthe inner edge of the head 22. A gasket 30 of composition material isadapted to engage -against the underside of the head 22 and is providedwith a central opening 3| in which the stem or socket member 25 isreceived. A clamping plate 32 provided with a central opening 33 engagesabout the stern member 25 and against the underside of the gasket 3l).The clamping plate 32 of disc-like conguration and has a diametersubstantially less than vthe diameter of the gasket 30 thereby forming aseat engaging portion 34 outwardly of the periphery of the clampingplate 32. 25 is provided with a peripheral groove 35 in which a holdingspring 36 is adapted to remov ably engage. The spring ring 36 is ofsplit construction and engages against/fthe underside of the clampingplate 32 for holding the clamping plate 32 against the gasket 3D andholding gasket 30 against the underside of the head 22.

The gasket 3l) is formed of composition material similar to theconstruction of the gasket I4, being formed of such material as will notbe materially affected by fluids such as gasoline or the like.

A poppet valve formed in accordance with this invention will provide avalve structure which can be easily and quickly assembled and can be lcombined with a valve assembly similar to that shown in my co-pendingapplications in such a manner that it is not necessary to grind thevalve head onto the valve seat as is customary where a metal valve headengages a metal valve seat. This valve structure also permits the quickreplacement of the seat engaging portion thereof in the event thegasket'l becomes worn so'that the valve leaks. This replacement may beaccomplished by expanding the holding spring 36 and the expanding ofsuch spring or ring would release the clamping plate so that the gasketmay be removed and a new gasket applied.

'I'his valve structure has been particularly designed for use in valveswhich are associated with a fuel supply line for an internal combustionengine such as an airplane engine and is adapted to be interposed in avalve assembly which is 45 connected between the engine and the fuelsupply tanks. I-Ieretofore in valve structures connected to airplaneengines for connecting the engine to one of a number of fuel supplytanks the valves have been ground onto the valve seats 50 and when thesevalves become lworn or otherwise in a condition where they will notadequately close the valve ports it is necessary to regrind the valvesonto the valve seats. This heretofore has necessitated the returnV ofthe valve assem- 55 blies to the factory where specialV machinery hasbeen set up to regrind the valves onto the valve seats. Howevenwith avalve structure as shown herein it is only necessary to take the valveassembly apart and then withdraw the valve mem- 60 bers from the valvehousing and renew the gasket The stern member or socket I ashereinbefore stated. These gaskets are of such a composition that theywill not unduly swell upon contact with a uid or liquid passing throughthe valve assembly and when a new gasket has been mounted on the valvestructure this new gasket will automatically conform to theconfiguration of the seat in the event the seat is not perfect. Invaddition to this the provision of a composition seat engaging meanscarried by the valve head provides a structure wherein the valve willnot leak in thevevent a small article such as a ber or granular articleis caught between the gasket and the valve seat. Where this occurs thegasket will not be tilted as is the case with a solid head, but will beindented by the article engaging between the gasket and the seat so thata small article of this character will not have the effect of holdingthe valve in partly open position.

The advantage of the poppet valve structure as hereinbefore set forth,.is such that the parts are so arranged and constructed whereby thegasket is prevented from buckling and is not subjected to a torsionalshearing force from the clamping plate and furthermore is capable ofradial expansion.

What I claim is:

I `A poppet valve comprising a head formed of a at annulus, astemintegral with and extending laterally from onerside of said head, saidstem having an enlarged outer hollow portion and a reduced solid rearportion, said outer portion being open at its outer end and closed atits inner end, the'forward end of said rear portion being integralaxially with the inner end of the outer portion, said outer portionhaving its forward end integral with the said side of the head andhaving its inner face forming a rearward continuation of the inner edgeof the head, said outer portion being formed in its outer peripheryintermediate its ends with a circumferentially extending endless groove,a flat gasket surrounding and bearing against the outer periphery of thesaid outer portion, bearing throughout against the said side of andhaving its outer edge flush with the outer edge of said head, a flatdisc-like clamping plate having an axial opening, said plateencompassing'said outer portion and of a diameter less than the outerdiameter of the gasket to thereby provide the latter with a reinforcedvalve seat engaging portion outwardly of' said plate, said plate beinginterposed between the outer sidev of said groove andsaid gasket havingits forward side bearing throughout thereof against the rear side of thegasket, and an annular resilient removable means mounted in andextending from said groove and bearing against the rear side of theplate for holding the latter, said gasket and said head in abuttingrelation.

GEORGE' T. DOWNEY.

